Well, the monitor is not turning on. The inverter has been replaced, then the CFL was replaced. And when that was replace the screen lit up again then it just went dark again, so I figured the inverter cable is next. Feel free to comment if you have any other ideas

I don't have the cable to view it on external monitor, that's the first thing I wanted to do. I bought the CFL off ebay (search: 180428211122). I didn't solder the CFL, all I did was replaced the inverter (ebay: 300340075724). This isn't my Mac to begin with, just trying to help out a friend, so that's why I don't have access to it right now.